Improvement in refining and smelting furnaces



S. M. FALES:

Refining Iron and Steel.

Patented May 14, 1861.A

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Inventor, @1W

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introduction of suitable iiuxes.

Unirse STATES PATENT Ormes@` SQUIRE M. 'FALES, OF BALTIMORE, MARYLAND.

IMPROVEMENT IN REFINING AND SIVIELTING FURNACES.

Specification forming part of Letters Patent No. 32,279, dated May14,1861.

V.To a/ZZ whom it may concern:

lowing is a full, clear, and exact description of the same, referencebeing had to the accompanying drawings, forming a part of thisspeciiication, in which- Figure lis a perspective view of asmelting-furnace as improved by me, and Fig. 2 is a verticallongitudinal section of the same.

Similar letters of reference in each of the two figures indicatecorresponding parts.

My present improvement relates particularly to the furnace patented tome on the 8th day of February, 1859; and the object of the same is togive the saidfurnace capacity for melting andrefining at one operation alarge quantity of pig or cast iron, or

. other metals for large castings, and also to maintain a properfluidity of the large mass during the operation, and until the `furnaceis tapped and the metal run off into a mold adapted for a large casting.

The nature of my invention consists in extending one or more of thearches of my said patent furnace, and having the said extended arch orarches communicate by a flue with an auxiliary stack or chimney, or witha series of auxiliary stacks or chimneys, C, substantially ashereinafter described.

To enable others to make and use my invention, I will proceed todescribe its construction and operation.

The furnace patented to me at. theV .date above stated consists of astack or cone, D, a

central melting-chamber, B, and side arches,

A, with passages a through their tops for the By this arrangement, asdescribed in my said patent, the blast is allowed a chance to expandlaterally or circulate before it rises in the cone of the furnace7instead of being compelled to pass, as previously, directly upward; andthus having the blast circulate has been found in practice to givegreater efficiency to the furnace and insures a superior quality ofiron.

it becomes necessary that the heated gases be kept constantlycirculating over the large mass of molten metal which flows into theenlarged side arch or chamber, A, in order to maintain the properiiuidity of the mass until the desired quantity for a good-sized castinghas been melted; and to effect this result I have provided an auxiliarystack or chimney, C, at the terminus of each arch or chamber, and made afree draft through from the furnace to said chimney. I also haveprovided a slidedamper, s, at the upper end of the cone or stack D,andof the auxiliary chimney or stack O, so that the direction of thedraft may be regulated or the same reversed as occasion may require.

By' providing an auxiliary draftchimney the heated gases from the fuelwhich is employed for smelting the iron are caused to circulate over themass of melted metal which iiows into the extended arch or chamber fromthe smelting-chamber, and thus all danger of the large mass of metalbecoming cool or assumin g any other than a fluid state is obviated.Again, if it is desirable to increase or decrease heat in the main'stackor cone, or to change the direction of the heated gases, it can beaccomplished by entirely or .partly closing the damper of the auxiliarychimney and opening fully or partially the damper of the main cone orstack.

The improvement described is an important one when employed inconnection with my patented furnace, as it enables ine to cast andrefine large quantities of metal at one operation and in the samefurnace, and to keep the same in a proper fluid state any desirablelength of time with a small consumption of fuel.

In smelting with my furnace, the iron or l Extending one or more of thearches A of ores and the fuel arepiled together inthe main the furnace BD, constructed as set forth in stack or cone and in the melting-chamber.my patent dated February 8, 1859, and hav- The luXes are introducedthrough the passages ing the said extended arch or arches commua a. Asfast as the iron or ores are melted7 i nieate by a flue With anauxiliary stack or the puried or rened metal spreads laterally chimney,or with a series of auxiliary stacks aud Vruns into the arch or chamberA A', and orI chimneys, C, substantially as and for the at properperiods the arch is tapped at E, and purposesset forth.

'the :melted mass run off into the mold or place SQUIRE M. FALES.provided for its reception. Witnesses:

What I claim as my invention, and desire to l WM. H. HAYWARD,

secure by Letters Patent, isl BEN SMITH.

